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dm: zero silently drop discards
author
Mike Snitzer
<snitzer@redhat.com>
Thu, 12 Aug 2010 03:14:12 +0000
(
04:14
+0100)
committer
Alasdair G Kergon
<agk@redhat.com>
Thu, 12 Aug 2010 03:14:12 +0000
(
04:14
+0100)
Have the zero target silently drop a discard rather than fail the
request with -EOPNOTSUPP.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
drivers/md/dm-zero.c
patch
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diff --git
a/drivers/md/dm-zero.c
b/drivers/md/dm-zero.c
index
bbc9703
..
cc2b3cb
100644
(file)
--- a/
drivers/md/dm-zero.c
+++ b/
drivers/md/dm-zero.c
@@
-22,6
+22,11
@@
static int zero_ctr(struct dm_target *ti, unsigned int argc, char **argv)
return -EINVAL;
}
return -EINVAL;
}
+ /*
+ * Silently drop discards, avoiding -EOPNOTSUPP.
+ */
+ ti->num_discard_requests = 1;
+
return 0;
}
return 0;
}